package liyuanchen.rabc.view;

import java.util.Scanner;

public class MainView {

    public static final String MENU = """
            --------------------
                    RBAC系统
            --------------------
            |    0   退出系统   |
            |    1   部⻔管理   |
            |    2   ⻆⾊管理   |
            |    3   ⽤户管理   |
            --------------------
            请输⼊选项：""";

    public static Scanner input;
    private static MainView singleton;

    static {
        input = new Scanner(System.in);
    }

    private final DeptView deptView;
    private final RoleView roleView;
    private final UserView userView;

    private MainView() {
        deptView = DeptView.getInstance();
        roleView = RoleView.getInstance();
        userView = UserView.getInstance();
    }

    public static MainView getInstance() {
        if (singleton == null) {
            singleton = new MainView();
        }
        return singleton;
    }

    /**
     * 显示界面
     */
    public void show() {
        String menuChoice;
        do {
            System.out.println(MENU);
            menuChoice = input.nextLine();
            switch (menuChoice) {
                case "0" -> System.out.println("成功退出系统，欢迎再次使⽤！");
                case "1" -> deptView.show();
                case "2" -> roleView.show();
                case "3" -> userView.show();
                default -> System.out.println("输⼊⾮法，请输⼊正确的菜单编号！");
            }
        } while (!"0".equals(menuChoice));
        input.close();
    }
}

